天然气地球科学

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贵州煤层气高产主控因素及甜点区综合评价模型

杨晓盈,李永臣,朱文涛,黄纪勇,单永乐,张强   

  1. 1.贵州省非常规天然气勘探开发利用工程研究中心,贵州 贵阳 550081;
    2.中石油煤层气有限责任公司,北京 100028;
    3.青海油田公司涩北作业公司,青海 格尔木 816000;
    4.陕西省韩城市煤炭局,陕西 韩城 715400
  • 收稿日期:2018-06-26 修回日期:2018-08-23 出版日期:2018-11-10
  • 作者简介:杨晓盈(1989-),女,湖北襄阳人,工程师,硕士,主要从事煤层气勘探开发、压裂改造及排采等研究. E-mail:yangxiaoying@swgas.com.cn.
  • 基金资助:
    遵义煤层气勘探开发示范项目(编号:2016-520000-07-03-133918)资助.

The main controlling factors for production and the comprehensive evaluation model of dessert area of coalbed methanein Guizhou Province

Yang Xiao-ying,Li Yong-chen,Zhu Wen-tao,Huang Ji-yong,Shan Yong-le,Zhang Qiang   

  1. 1.Guizhou Unconventional Gas R&D Center,Guiyang 550081,China; 2.PetroChina Coalbed Methane Company Limited,Beijing 100028,China; 3.Qinghai Oilfield Company Sebei Operating Company,Golmud 816000,China; 4.Hancheng Coal Bureau of Shaanxi Province,Hancheng 715400,China
  • Received:2018-06-26 Revised:2018-08-23 Online:2018-11-10

摘要: 煤层气高产甜点区的综合评价方法对于勘探选区、提高产能到位率具有重要意义。贵州过去采用的评价方法更多的侧重于资源富集条件,而对储层改造与排水采气的技术应用重视不够,导致选区失败。如何从资源富集区中优选高产甜点区是制约贵州煤层气产业发展的关键。以贵州各地区排采井的生产数据资料、各类分析化验、压裂施工资料等为依据,从气藏分析与产能预测入手,围绕资源富集、储层导流能力及地层能量3方面,深入剖析各相关因素对产能的影响机理和影响程度,并在此基础上提出了影响煤层气富集高产的综合评价指标体系,建立了基于产能分析的高产甜点区综合评价模型,选取贵州各个区块具有代表性的典型井对模型的可靠性进行验证,综合评价结果的相对排序与气井产能具有较好的吻合性。

关键词: 煤层气, 主控因素, 高产甜点区, 综合评价, 评价指标

Abstract: The comprehensive evaluation method of high yield dessert area is of great importance to the regional exploration and develop mentand the increase of CBM capacity.The previous evaluation method was more focused on the resources enrichment conditions,whichhad de-emphasized the technical application of reservoir reconstruction and drainage gas recovery and it resulted in the selection failure.So how to optimize high yield dessert area from these resource enrichment regions is the key to restrict CBM industry development of Guizhou Province.Based on the production data,the analysis of all kinds of tests and the fracturing construction data,we start from the gas reservoir analysis and productivity prediction,surrounding the three aspects of the enrichment condition,reservoir flow conductivity and formation energy,deeply analyzed the impacting mechanism of the related factors and the influence degree to the capacity,and proposed the comprehensive evaluation index system which will influence the CBM enrichment and high yield to a great extent.At the same time we established acomprehensive evaluation model of the high-yield dessert area.Selecting 8 typically representative wells of each block in Guizhou to validate the reliability of the model,the results show that the relative order of comprehensive evaluation results is in good agreement with the gas well productivity.

Key words: Coal-seam gas, Control factors, High yield dessert area, Comprehensive assessment, Evaluation index

中图分类号: 

  • TE357
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